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公开(公告)号:US4756225A
公开(公告)日:1988-07-12
申请号:US933224
申请日:1986-11-06
IPC分类号: G10C3/12
CPC分类号: G10C3/12
摘要: A keyboard of pianos and similar key instruments which has a keyboard frame and a plurality of key arms which are mounted in the keyboard frame in such a way that the key arms only can swing in a plane that is perpendicular to the plane of the keyboard frame. The keyboard frame consists of metal and a vibration absorbing material is arranged between the bearing mechanisms on the key arms and the keyboard frame. This will make the manufacture of the keyboard cheaper and reduce the need of readjustments of the keyboard. The vibration absorbing material is provided in grooves in the keyboard frame, and the bearing means, which can consist of pins are fastened in the vibration absorbing material.
摘要翻译: PCT No.PCT / SE86 / 00014 Sec。 371日期:1986年11月6日 102(e)日期1986年11月6日PCT Filted 1986年1月17日PCT公布。 第WO86 / 04442号公报 日期:1986年7月31日。钢琴和类似的钥匙乐器的键盘,其具有键盘框架和多个键臂,其安装在键盘框架中,使得键臂只能在垂直的平面中摆动 到键盘框架的平面。 键盘框架由金属组成,振动吸收材料布置在键臂上的轴承机构和键盘框架之间。 这将使得键盘的制造更便宜,并且减少了键盘重新调整的需要。 振动吸收材料设置在键盘框架的凹槽中,并且可由销组成的轴承装置紧固在振动吸收材料中。
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公开(公告)号:US4112809A
公开(公告)日:1978-09-12
申请号:US704086
申请日:1976-07-09
CPC分类号: G10D1/00
摘要: A stringed instrument for training purposes resembles the usual instrument but comprises a body of sound-damping material which replaces the resonance-box to reduce exterior sound, the sound of the strings being transmitted to the ears of the user by a listening device.
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